Ответ:

1. Are you as tall as your cousin?
2. She’s nowhere near as good at sports as her friend is.
3. London's population is nothing like as big as Mexico City’s.
4. Your house is not as close to the school as mine is.
5. It's quite a bit colder than it was yesterday.
6. There are just as many students in my class as in yours.
7. He's a lot worse at cooking than his sister!
8. She feels a little more upbeat than she did last week.